Double wall cup



FIG. 1 is a front perspective view of a double wall cup, consisting of an inner and outer cup, showing my new design;

FIG. 2 is a second perspective view thereof;

FIG. 3 is a top plan view of the outer cup of FIG. 1;

FIG. 4 is a cross-sectional view thereof taken along 4-4 of FIG. 1;

FIG. 5 is an expanded view of area 5 of FIG. 4;

FIG. 6 is a side elevation view of FIG. 3; and,

FIG. 7 is a side elevation view of the inner cup of FIG. 1. 

CLAIM The ornamental design for a double wall cup, as shown and described. 